The U.S. aircraft register, updated daily
Parts

Turnbutton

No failure report names the turnbutton. 5 FAA approvals let 2 companies make a replacement turnbutton, Mitchell Pma, LLC holding the most (3).

Approved replacement parts 5 parts manufacturer approvals

A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a turnbutton and sell it as an approved part for the models named. These are the companies holding such approvals for a turnbutton:

Mitchell Pma, LLC 3Turbine Kinetics INC, A Heico Aerospace Company 2

For these models most: Airbus A321 (4), Airbus A320 (4), Airbus A319 (4), Boeing 737 (1).

MakerPartReplacesFitsGrantedStatus
Mitchell Pma, LLCTurnbutton Assy - 90 LH 29-014-2004MIT29-014-2004Airbus SAS A318-111, A318-112, A318-1212026-06-10current
Mitchell Pma, LLCTurnbutton Assy - 90 LH 29-014-2004MIT29-014-2004The Boeing Company 737-300 Series, 737-400 Series,...2026-06-10current
Mitchell Pma, LLCTurnbutton Assy - 90 LH 29-014-2004MIT29-014-2004Airbus A318 Model -111, A318 Model -112,...2020-02-11current
Turbine Kinetics INC, A Heico Aerospace CompanyTurnbutton Assy 90 LH 29-014-2004KT29-014-2004Airbus A318 Model-111, A318 Model-112, A318...2015-09-13current
Turbine Kinetics INC, A Heico Aerospace CompanyTurnbutton Assy 90 LH 29-014-2004KT29-014-2004Airbus A318 Model-111, A318 Model-112, A318...2014-06-05current

Sources: the FAA's service difficulty reports since 1995 (a report is a part that failed and was fixed, as filed by an airline, repair station or owner; the count shows reporting as much as reliability) and the parts manufacturer approvals in the FAA's Dynamic Regulatory System. The part name is the reporters' and the approval holders' own words, reduced to the first plain words so that spellings meet.